Some grocery stores do carry them-especially the tuna. Many will also have the chicken.

You will find them in the packaged meat area near spam usually.

For best success most people on the board post finding them at Walmart Supercenters. I have also found them at Target Superstores as well as many grocery stores.

Avaialability varies:

Grocery stores Tuna always, chicken sometimes, hamburger rarely

Target and Walmart seem to carry all three